Home
Class 10
PHYSICS
Selwyn is 16 yr old and wears a spectacl...

Selwyn is 16 yr old and wears a spectacle having a power of +2 D. Answer the following questions:
Compute the focal length of his lens.

Text Solution

Verified by Experts

P= `+ 2D`
`f = 1/P = 1/2 `
= 0.5 m
`therefore " focal length = 0.5 metre" ` 2
Promotional Banner

Topper's Solved these Questions

  • LENSES

    CHETAN PUBLICATION|Exercise Assignment|14 Videos

  • LENSES

    CHETAN PUBLICATION|Exercise Answer the following in brief.|8 Videos

  • HEAT

    CHETAN PUBLICATION|Exercise ASSIGNMENT - 5 (Answer the following: (Any 1))|3 Videos

  • MODEL ACTIVITY SHEET

    CHETAN PUBLICATION|Exercise SOLVE THE FOLLOWING QUESTIONS : (ANY 1)|9 Videos

Similar Questions

Explore conceptually related problems

Vijay is 16 yr old and wears a spectacle having a power of -2D. Answer the following questions: Compute the focal length of his lens.

Selwyn is 16 yr old and wears a spectacle having a power of +2 D. Answer the following questions: Name the eye defect he has.

Vijay is 16 yr old and wears a spectacle having a power of -2D. Answer the following questions: Name his eye defect.

Selwyn is 16 yr old and wears a spectacle having a power of +2 D. Answer the following questions: Which lens is used by selwyn?

Selwyn is 16 yr old and wears a spectacle having a power of +2 D. Answer the following questions: State two reasons why this defect is caused?

Vijay is 16 yr old and wears a spectacle having a power of -2D. Answer the following questions: State two reasons why this defect is caused?

Ankit developed an eye defect at the age of 65 yrs and had to wear a lens of power +3D. Answer the following questions: (a) Name the eye defect. (b) State two reasons why this defect is caused? (c) Compute the focal length of his lens

Power of a lens is -4D, then its focal length is